From 3c930c45e9ac85ca30a645be6d2f650c952bf4ea Mon Sep 17 00:00:00 2001
From: Nick Pezza <pezza@hey.com>
Date: Wed, 6 Sep 2023 11:38:15 -0400
Subject: [PATCH] Allow setting an env file when running containers

---
 lib/kamal/utils.rb         | 2 ++
 test/configuration_test.rb | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/lib/kamal/utils.rb b/lib/kamal/utils.rb
index c2461373b..058e3687f 100644
--- a/lib/kamal/utils.rb
+++ b/lib/kamal/utils.rb
@@ -21,6 +21,8 @@ def argumentize(argument, attributes, sensitive: false)
   def argumentize_env_with_secrets(env)
     if (secrets = env["secret"]).present?
       argumentize("-e", secrets.to_h { |key| [ key, ENV.fetch(key) ] }, sensitive: true) + argumentize("-e", env["clear"])
+    elsif (file = env["file"]).present?
+      argumentize "--env-file", file
     else
       argumentize "-e", env.fetch("clear", env)
     end
diff --git a/test/configuration_test.rb b/test/configuration_test.rb
index 615053129..7d46e5122 100644
--- a/test/configuration_test.rb
+++ b/test/configuration_test.rb
@@ -128,6 +128,12 @@ class ConfigurationTest < ActiveSupport::TestCase
     assert_equal [ "-e", "REDIS_URL=\"redis://x/y\"" ], @config.env_args
   end
 
+  test "env file" do
+    config = Kamal::Configuration.new({ env: { file: "/path/to/.env" } })
+
+    assert_equal [ "--env-file", "/path/to/.env" ], config.env_args
+  end
+
   test "env args with clear and secrets" do
     ENV["PASSWORD"] = "secret123"